Master Hibernate and JPA with Spring Boot in 100 Steps - Step 28 - OneToOne Mapping - Bidirectional Relationship - Part

The video tutorial explains the relationship between student and passport entities in a database. Initially, a unidirectional relationship is established, allowing navigation from student to passport. The tutorial then demonstrates how to create a bidirectional relationship, enabling navigation from passport to student. It highlights the importance of avoiding data duplication in table design and discusses setting the owning side of a relationship to maintain data integrity. The tutorial concludes with a demonstration of the changes in the database schema after implementing these concepts.

What type of relationship allows you to retrieve passport details from a student entity?

• Self-referential relationship

• Unidirectional relationship

• Bidirectional relationship

• Many-to-many relationship

What is the purpose of establishing a bidirectional relationship between entities?

• To eliminate the need for primary keys

• To simplify the database schema

• To increase the number of database tables

• To allow navigation from one entity to another in both directions

Why is data duplication in database tables considered undesirable?

• It increases the complexity of queries

• It leads to inconsistent data

• It enhances data security

• It improves data retrieval speed

What does the 'owning side' of a relationship in a database refer to?

• The entity that is queried more frequently

• The entity that has more attributes

• The entity that is referenced by the foreign key

• The entity that contains the foreign key

How can you specify the owning side of a relationship in JPA?

• By using the 'cascade' attribute

• By using the 'fetch' attribute

• By using the 'mapped by' attribute

• By using the 'join column' attribute

What happens to the table structure when the 'mapped by' attribute is correctly implemented?

• A new table is created to manage the relationship

• Both tables have foreign keys referencing each other

• Only one table maintains the foreign key

• No foreign keys are present in either table

Which entity should have the 'mapped by' attribute in a bidirectional relationship?

• The non-owning side

• Neither entity

• The owning side

• Both entities